package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
	@Autowired
	private OrderMapper orderMapper;
	@Autowired
	private UserMapper userMapper;
	@Autowired
	private WorkspaceService workspaceService;

	@Override
	public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
		List<LocalDate> dateList = new ArrayList<>();
		dateList.add(begin);
		while (!begin.equals(end)) {
			begin = begin.plusDays(1);
			dateList.add(begin);
		}
		List<Double> turnoverList = new ArrayList<>();
		for (LocalDate date : dateList) {
			Map<String, Object> map = new HashMap<>();
			map.put("begin", LocalDateTime.of(date, LocalTime.MIN));
			map.put("end", LocalDateTime.of(date, LocalTime.MAX));
			map.put("status", Orders.COMPLETED);
			Double turnover = orderMapper.sumByMap(map);
			turnover = turnover == null ? 0.0 : turnover;
			turnoverList.add(turnover);
		}

		return TurnoverReportVO.builder().dateList(StringUtils.join(dateList, ",")).turnoverList(StringUtils.join(turnoverList, ",")).build();
	}

	@Override
	public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
		List<LocalDate> dateList = new ArrayList<>();
		dateList.add(begin);
		while (!begin.equals(end)) {
			begin = begin.plusDays(1);
			dateList.add(begin);
		}
		List<Integer> newUserList = new ArrayList<>();
		List<Integer> totalUserList = new ArrayList<>();
		for (LocalDate date : dateList) {
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
			//总共用户 数
			Integer totalUser = getUserCount(null, endTime);
			//新增用户 数
			Integer newUser = getUserCount(beginTime, endTime);
			totalUserList.add(totalUser);
			newUserList.add(newUser);
		}
		return UserReportVO.builder().dateList(StringUtils.join(dateList, ",")).totalUserList(StringUtils.join(totalUserList, ",")).newUserList(StringUtils.join(newUserList, ",")).build();
	}

	@Override
	public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
		List<LocalDate> dateList = new ArrayList<>();
		dateList.add(begin);
		while (!begin.equals(end)) {
			begin = begin.plusDays(1);
			dateList.add(begin);
		}
		//每天订单总数集合
		List<Integer> orderCountList = new ArrayList<>();
		//每天有效订单数集合
		List<Integer> validOrderCountList = new ArrayList<>();
		for (LocalDate date : dateList) {
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
			Integer orderCount = getOrderCount(beginTime, endTime, null);
			Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
			orderCountList.add(orderCount);
			validOrderCountList.add(validOrderCount);
		}
		//订单总数
		Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
		//有效订单数
		Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
		return OrderReportVO.builder().dateList(StringUtils.join(dateList, ",")).orderCountList(StringUtils.join(orderCountList, ",")).validOrderCountList(StringUtils.join(validOrderCountList, ",")).totalOrderCount(totalOrderCount).validOrderCount(validOrderCount).build();
	}

	@Override
	public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
		LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
		LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
		List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);
		String nameList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.joining(","));
		String numberList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).map(Object::toString).collect(Collectors.joining(","));
		return SalesTop10ReportVO.builder().nameList(nameList).numberList(numberList).build();
	}

	@Override
	public void exportBusinessData(HttpServletResponse response) {
		LocalDate begin = LocalDate.now().minusDays(30);
		LocalDate end = LocalDate.now().minusDays(1);
		BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));

		InputStream is = this.getClass().getClassLoader().getResourceAsStream("templates/运营数据报表模板.xlsx");

		try {
			XSSFWorkbook excel = new XSSFWorkbook(is);
			XSSFSheet sheet = excel.getSheet("Sheet1");
			sheet.getRow(1).getCell(1).setCellValue("时间：" + begin.toString() + "至" + end.toString());
			//获取第4行
			XSSFRow row = sheet.getRow(3);
			row.getCell(2).setCellValue(businessData.getTurnover());
			row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
			row.getCell(6).setCellValue(businessData.getNewUsers());
			row = sheet.getRow(5);
			row.getCell(2).setCellValue(businessData.getValidOrderCount());
			row.getCell(4).setCellValue(businessData.getUnitPrice());
			for (int i = 0; i < 30; i++) {
				LocalDate date = begin.plusDays(i);
				//准备明细数据
				businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
				row = sheet.getRow(7 + i);
				row.getCell(1).setCellValue(date.toString());
				row.getCell(2).setCellValue(businessData.getTurnover());
				row.getCell(3).setCellValue(businessData.getValidOrderCount());
				row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
				row.getCell(5).setCellValue(businessData.getUnitPrice());
				row.getCell(6).setCellValue(businessData.getNewUsers());
			}
			//通过输出流将文件下载到客户端浏览器中
			ServletOutputStream out = response.getOutputStream();
			excel.write(out);
			out.flush();
			out.close();
			excel.close();
		} catch (IOException e) {
			e.printStackTrace();
		}


	}

	private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
		Map<String, Object> map = new HashMap<>();
		map.put("begin", beginTime);
		map.put("end", endTime);
		map.put("status", status);
		return orderMapper.countByMap(map);
	}

	private Integer getUserCount(LocalDateTime begin, LocalDateTime end) {
		Map<String, Object> map = new HashMap<>();
		map.put("begin", begin);
		map.put("end", end);
		return userMapper.countByMap(map);
	}
}
